Setup Selenium WebDriver Grid with Docker

Integration tests are an integral part of any modern web application, you’ll likely be running selenium tests. While Selenium tests are easy to write and execute on your local workstation. Now you’re stuck with two options like SaaS provider like SauceLabs and BrowserStack etc. or running your own Selenium Grid on multiple machines and managing a multitude of machines and browser versions. This is going to make you CI process with slow builds.

In this article, you’ll see how easy it is to set up a Selenium Grid with Docker, how easy it is to maintain, and how to extend and grow your Selenium grid to satisfy your team’s needs.

Challenges :

If you use Selenium Grid for running you test, You must have to install so many configurations and tools on each machine which your test depends on like Java, Selenium WebDriver, Test Browsers, VNC etc. Maintaining machines in grid are sometimes costly and time consuming to maintain.

Why Docker :

With containerized test executors, the test suites can be executed on any platforms without library dependencies. Selenium Grid is distributed system of nodes for running tests. Instead of running your grid across multiple virtual machines, using Docker we can run them all Test’s parallel and fast on a single large machine using Docker.

Selenium Grid Hub and Nodes in Docker :

To set up Selenium WebDriver Grid we need to download a couple of Selenium Images step by step: